Add localization support and translation script

- Introduced a new extension for localization in Flutter with `LocalizationExtension` in `l10n.dart`.
- Added a Python script `translate.py` for translating ARB/JSON localization files using a local Ollama model, preserving keys and placeholders, and handling ICU format rules.

lib/widgets/debug_frame_viewer.dart

@@ -1,5 +1,6 @@
 import 'dart:typed_data';
 import 'package:flutter/material.dart';
+import '../l10n/l10n.dart';
 import '../connector/meshcore_protocol.dart';
 
 /// Debug widget to show the hex dump of a frame
@@ -10,23 +11,32 @@ class DebugFrameViewer {
         .join(' ');
 
     final details = StringBuffer();
-    details.writeln('Frame Length: ${frame.length} bytes\n');
-    details.writeln('Command: 0x${frame[0].toRadixString(16).padLeft(2, '0')}');
+    details.writeln(context.l10n.debugFrame_length(frame.length));
+    details.writeln('');
+    details.writeln(
+      context.l10n.debugFrame_command(frame[0].toRadixString(16).padLeft(2, '0')),
+    );
 
     if (frame[0] == cmdSendTxtMsg && frame.length > 37) {
-      details.writeln('\nText Message Frame:');
-      details.writeln('- Destination PubKey: ${pubKeyToHex(frame.sublist(1, 33))}');
-      details.writeln('- Timestamp: ${readUint32LE(frame, 33)}');
-      details.writeln('- Flags: 0x${frame[37].toRadixString(16).padLeft(2, '0')}');
+      details.writeln('');
+      details.writeln(context.l10n.debugFrame_textMessageHeader);
+      details.writeln(context.l10n.debugFrame_destinationPubKey(pubKeyToHex(frame.sublist(1, 33))));
+      details.writeln(context.l10n.debugFrame_timestamp(readUint32LE(frame, 33)));
+      details.writeln(
+        context.l10n.debugFrame_flags(frame[37].toRadixString(16).padLeft(2, '0')),
+      );
       final txtType = (frame[37] >> 2) & 0x03;
-      details.writeln('- Text Type: $txtType ${txtType == txtTypeCliData ? "(CLI)" : "(Plain)"}');
+      final typeLabel = txtType == txtTypeCliData
+          ? context.l10n.debugFrame_textTypeCli
+          : context.l10n.debugFrame_textTypePlain;
+      details.writeln(context.l10n.debugFrame_textType(txtType, typeLabel));
       if (frame.length > 38) {
         final textBytes = frame.sublist(38);
         final nullIdx = textBytes.indexOf(0);
         final text = String.fromCharCodes(
           nullIdx >= 0 ? textBytes.sublist(0, nullIdx) : textBytes
         );
-        details.writeln('- Text: "$text"');
+        details.writeln(context.l10n.debugFrame_text(text));
       }
     }
 
@@ -44,9 +54,9 @@ class DebugFrameViewer {
                 style: const TextStyle(fontFamily: 'monospace', fontSize: 12),
               ),
               const Divider(),
-              const Text(
-                'Hex Dump:',
-                style: TextStyle(fontWeight: FontWeight.bold),
+              Text(
+                context.l10n.debugFrame_hexDump,
+                style: const TextStyle(fontWeight: FontWeight.bold),
               ),
               const SizedBox(height: 8),
               Text(
@@ -59,7 +69,7 @@ class DebugFrameViewer {
         actions: [
           TextButton(
             onPressed: () => Navigator.pop(context),
-            child: const Text('Close'),
+            child: Text(context.l10n.common_close),
           ),
         ],
       ),